Generalization Analysis  
In addition to image captioning, the Prophet Attention can also be applied to other similar generation tasks. Therefore, we further conduct experiments on the MSCOCO dataset for paraphrase generation task [1]}, [2]}, [3]} and the MSR-VTT dataset for video captioning task [4]}, [5]}.
For detailed descriptions of these two tasks and the implementation details, please refer to our supplementary materials.
